Coherence of a Magnetoexciton Condensate in a Quantum Hall Insulator

The coherent properties of a dense ensemble of triplet cyclotron magnetoexcitons in a quantum Hall insulator near the filling factor have been studied using shear interferometry methods. It has been found that a condensate of magnetoexcitons formed at fairly low temperatures by means of nonresonant...

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Veröffentlicht in:	JETP letters 2021-10, Vol.114 (7), p.417-422
Hauptverfasser:	Gorbunov, A. V., Larionov, A. V., Kulik, L. V., Timofeev, V. B.
Format:	Artikel
Sprache:	eng
Schlagworte:	Atomic Biological and Medical Physics Biophysics Condensates Condensed Matter Cyclotrons Electrons Low temperature Magnetic properties Molecular Optical and Plasma Physics Particle and Nuclear Physics Photoexcitation Physics Physics and Astronomy Quantum Information Technology Shear interferometry Solid State Physics Spintronics
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Beschreibung
Zusammenfassung:	The coherent properties of a dense ensemble of triplet cyclotron magnetoexcitons in a quantum Hall insulator near the filling factor have been studied using shear interferometry methods. It has been found that a condensate of magnetoexcitons formed at fairly low temperatures by means of nonresonant photoexcitation has a higher degree of coherence compared to the gas of uncondensed magnetoexcitons: the transverse length of coherence reaches about 10 μm. The condensate can include up to 20% of all triplet magnetoexcitons.
ISSN:	0021-3640 1090-6487
DOI:	10.1134/S0021364021190073